Inquiry:How to disable my Debian server firewall ?

[hadi motamedi]

Dear All
Can you please do me favor and let me know how can I disable my Debian
server firewall ? As I know , on the Linux server , I can make use of the
"#setup" command to disable my Linux firewall but my Debian server does not
have "setup" command . Please let me know how can disable my Debian server
firewall ?
Let me thank you in advance